OpenZFS 5561 - support root pools on EFI/GPT partitioned disks

Reviewed by: Jean McCormack <jean.mccormack@nexenta.com>
Reviewed by: Josef 'Jeff' Sipek <josef.sipek@nexenta.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>

OpenZFS-issue: https://www.illumos.org/issues/5561
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/1a902ef
Closes #5672

lib/libzfs/libzfs_pool.c

@@ -415,29 +415,6 @@ bootfs_name_valid(const char *pool, char *bootfs)
 	return (B_FALSE);
 }
 
-#if defined(__sun__) || defined(__sun)
-/*
- * Inspect the configuration to determine if any of the devices contain
- * an EFI label.
- */
-static boolean_t
-pool_uses_efi(nvlist_t *config)
-{
-	nvlist_t **child;
-	uint_t c, children;
-
-	if (nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_CHILDREN,
-	    &child, &children) != 0)
-		return (read_efi_label(config, NULL) >= 0);
-
-	for (c = 0; c < children; c++) {
-		if (pool_uses_efi(child[c]))
-			return (B_TRUE);
-	}
-	return (B_FALSE);
-}
-#endif
-
 boolean_t
 zpool_is_bootable(zpool_handle_t *zhp)
 {
@@ -466,7 +443,6 @@ zpool_valid_proplist(libzfs_handle_t *hdl, const char *poolname,
 	char *slash, *check;
 	struct stat64 statbuf;
 	zpool_handle_t *zhp;
-	nvlist_t *nvroot;
 
 	if (nvlist_alloc(&retprops, NV_UNIQUE_NAME, 0) != 0) {
 		(void) no_memory(hdl);
@@ -606,23 +582,6 @@ zpool_valid_proplist(libzfs_handle_t *hdl, const char *poolname,
 				(void) zfs_error(hdl, EZFS_OPENFAILED, errbuf);
 				goto error;
 			}
-			verify(nvlist_lookup_nvlist(zpool_get_config(zhp, NULL),
-			    ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
-
-#if defined(__sun__) || defined(__sun)
-			/*
-			 * bootfs property cannot be set on a disk which has
-			 * been EFI labeled.
-			 */
-			if (pool_uses_efi(nvroot)) {
-				zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
-				    "property '%s' not supported on "
-				    "EFI labeled devices"), propname);
-				(void) zfs_error(hdl, EZFS_POOL_NOTSUP, errbuf);
-				zpool_close(zhp);
-				goto error;
-			}
-#endif
 			zpool_close(zhp);
 			break;
 
@@ -1380,26 +1339,6 @@ zpool_add(zpool_handle_t *zhp, nvlist_t *nvroot)
 		return (zfs_error(hdl, EZFS_BADVERSION, msg));
 	}
 
-#if defined(__sun__) || defined(__sun)
-	if (zpool_is_bootable(zhp) && nvlist_lookup_nvlist_array(nvroot,
-	    ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0) {
-		uint64_t s;
-
-		for (s = 0; s < nspares; s++) {
-			char *path;
-
-			if (nvlist_lookup_string(spares[s], ZPOOL_CONFIG_PATH,
-			    &path) == 0 && pool_uses_efi(spares[s])) {
-				zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
-				    "device '%s' contains an EFI label and "
-				    "cannot be used on root pools."),
-				    zpool_vdev_name(hdl, NULL, spares[s], 0));
-				return (zfs_error(hdl, EZFS_POOL_NOTSUP, msg));
-			}
-		}
-	}
-#endif
-
 	if (zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL) <
 	    SPA_VERSION_L2CACHE &&
 	    nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
@@ -2357,15 +2296,11 @@ zpool_get_config_physpath(nvlist_t *config, char *physpath, size_t phypath_size)
 	    &child, &count) != 0)
 		return (EZFS_INVALCONFIG);
 
-#if defined(__sun__) || defined(__sun)
 	/*
-	 * root pool can not have EFI labeled disks and can only have
+	 * root pool can only have a single top-level vdev.
-	 * a single top-level vdev.
 	 */
-	if (strcmp(type, VDEV_TYPE_ROOT) != 0 || count != 1 ||
+	if (strcmp(type, VDEV_TYPE_ROOT) != 0 || count != 1)
-	    pool_uses_efi(vdev_root))
 		return (EZFS_POOL_INVALARG);
-#endif
 
 	(void) vdev_get_physpaths(child[0], physpath, phypath_size, &rsz,
 	    B_FALSE);
@@ -2672,18 +2607,6 @@ zpool_vdev_attach(zpool_handle_t *zhp,
 		(void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
 		    "cannot attach %s to %s"), new_disk, old_disk);
 
-#if defined(__sun__) || defined(__sun)
-	/*
-	 * If this is a root pool, make sure that we're not attaching an
-	 * EFI labeled device.
-	 */
-	if (rootpool && pool_uses_efi(nvroot)) {
-		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
-		    "EFI labeled devices are not supported on root pools."));
-		return (zfs_error(hdl, EZFS_POOL_NOTSUP, msg));
-	}
-#endif
-
 	(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
 	if ((tgt = zpool_find_vdev(zhp, old_disk, &avail_spare, &l2cache,
 	    &islog)) == 0)
@@ -4237,15 +4160,6 @@ zpool_label_disk(libzfs_handle_t *hdl, zpool_handle_t *zhp, char *name)
 	if (zhp) {
 		nvlist_t *nvroot;
 
-#if defined(__sun__) || defined(__sun)
-		if (zpool_is_bootable(zhp)) {
-			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
-			    "EFI labeled devices are not supported on root "
-			    "pools."));
-			return (zfs_error(hdl, EZFS_POOL_NOTSUP, errbuf));
-		}
-#endif
-
 		verify(nvlist_lookup_nvlist(zhp->zpool_config,
 		    ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
 

module/zfs/vdev.c

@@ -21,8 +21,8 @@
 
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
+ * Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
  */
 
 #include <sys/zfs_context.h>
@@ -3533,8 +3533,6 @@ vdev_is_bootable(vdev_t *vd)
 		    strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) {
 			return (B_FALSE);
 		}
-	} else if (vd->vdev_wholedisk == 1) {
-		return (B_FALSE);
 	}
 
 	for (c = 0; c < vd->vdev_children; c++) {